.background{
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    bottom: 0;
    background-image:url('/img/tj/background.png');
    background-repeat:no-repeat;
    background-size:100% 100%;
    -moz-background-size:100% 100%;
    overflow-y: auto;
}
.liImg{
    margin-top: 8%;
    width: 80%;
}